Title:
Syngas from Plastic Rejects: Evaluation of Gas Impurities from Dual Fluidized Bed Steam Gasification and an Integrated Gas Conditioning Unit
Author(s):
Huber, M., Hochstöger, D., Karel, T., Egger, A., Binder, M., Kadlez, D., Pröll, T., Hofbauer, H., Kuba, M.
Document(s):
Paper
Slide presentation
Abstract:
To expand the application of dual fluidized bed steam gasification, experiments with plastic-rich rejects were conducted in a 1 MW demonstration plant at the Syngas Platform Vienna. For facilitating further product gas applications in synthesis processes or direct combustion, the focus of this work is on the product gas impurities along the integrated syngas cleaning units. The on-site separation of major syngas impurities is conducted by an adapted gas cleaning concept, equipped with a cyclone, a hot gas filtration unit and a two-stage liquid scrubber unit. Measurements of tars were performed and supplemented with ammonia (NH3), hydrogen sulfide (H2S), hydrogen chloride (HCl) and hydrogen fluoride (HF) as selected inorganic components. All measured impurities were significantly reduced from e.g. 37 ppm HCl to 1 ppm, 293 ppm NH3 to 90 ppm and 11 g/Nm³ of GCMS tars to 1 g/Nm³. However, as these values are measured before a downstream fine gas purification, the amount of NH3 and H2S exceeds the catalyst thresholds for Fischer-Tropsch synthesis by three orders of magnitude. Essential additional conditioning steps are introduced for exceeding threshold values to ensure the compliance with application requirements independently of fluctuating feedstock quality.
Keywords:
gas cleaning, gasification, syngas, dual fluidized bed, plastic rejects, demonstration scale
Topic:
Biomass Conversion for Bioenergy
Subtopic:
Gasification for synthesis gas production
Event:
31st European Biomass Conference and Exhibition
Session:
4AO.5.4
Pages:
600 - 605
ISBN:
978-88-89407-23-3
Paper DOI:
10.5071/31stEUBCE2023-4AO.5.4
Price:
FREE
